Docker配置redis主从哨兵

1.从docker仓库拉取redis镜像

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1	`docker pull redis`

2.在/home下分别创建redis-6379-data，redis-6380-data，redis-6381-data

3.拷贝/etc/redis/redis.conf 到 /home下

4.复制redis.conf为redis-6379.conf， redis-6380.conf，redis.6381.con并且分别修改其中的配置， logfile指定不同的文件

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port 6380
 
logfile "redis-6380.log"
 
dir /data
 
appendonly yes
 
appendfilename appendonly.aof
 
slaveof 127.0.0.1 6379

5.docker启动3个redis

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1	`docker run -tdi -v` `/home/data:/data` `/home/redis-6379.conf:/usr/local/ect/redis/redis.conf -p 6379:6379 redis`

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1	`docker` `run` `-tdi` `-v` `/home/data:/data` `/home/redis-6380.conf:/usr/local/ect/redis/redis.conf` `-p` `6380:6380` `redis`

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1	`docker` `run` `-tdi` `-v` `/home/data:/data` `/home/redis-6381.conf:/usr/local/ect/redis/redis.conf` `-p` `6381:6381` `redis`

6.通过redis-cli分别连入创建好的redis服务器，测试主从是否配好

7.配置redis-sentinelm，创建三个sentinel文件,内容如下

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port 26379
 
dir "/data"
 
logfile "sentinel-26379.log"
 
sentinel monitor mymaster 127.0.0.1 6379 2
 
sentinel down-after-milliseconds mymaster 10000
 
sentinel failover-timeout mymaster 60000

只修改日志的文件名即可

8.通过docker启动三个sentinel

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1	`docker run -dit -v` `/home/sentinel-26379.conf:/usr/local/etc/redis/sentinel.conf -p 26379:26379 redis redis-sentinel` `/usr/local/etc/redis/sentinel.conf`

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1	`docker` `run` `-dit` `-v` `/home/sentinel-26380.conf:/usr/local/etc/redis/sentinel.conf` `-p` `26380:26380` `redis redis-sentinel` `/usr/local/etc/redis/sentinel.conf`

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1	`docker run -dit -v` `/home/sentinel-26381.conf:/usr/local/etc/redis/sentinel.conf -p 26381:26381 redis redis-sentinel` `/usr/local/etc/redis/sentinel.conf`

9.停止redis的master节点
docker stop master节点的containerid

10.连入从节点，查看主从状态

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1 2	`redis-cli -p 6380` `info replication`

11.稍等几十秒，从节点就会自动变成主节点

哨兵模式的原理采用了心跳机制和投票裁决机制。